TS-38628 Fix maven plugin build

teamscale-maven-plugin/pom.xml

@@ -9,6 +9,7 @@
         c.f. https://maven.apache.org/docs/3.2.1/release-notes.html
     -->
     <version>${revision}</version>
+    <packaging>maven-plugin</packaging>
 
     <name>Teamscale Maven Plugin</name>
     <description>Maven Plugin for Teamscale</description>
@@ -63,6 +64,12 @@
     </properties>
 
     <dependencies>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-engine</artifactId>
+            <version>5.11.4</version>
+            <scope>test</scope>
+        </dependency>
         <dependency>
             <groupId>org.jetbrains.kotlin</groupId>
             <artifactId>kotlin-stdlib</artifactId>
@@ -134,13 +141,14 @@
             <plugin>
                 <groupId>org.jetbrains.kotlin</groupId>
                 <artifactId>kotlin-maven-plugin</artifactId>
-                <version>2.1.0</version>
+                <version>${kotlin.version}</version>
                 <executions>
                     <execution>
                         <id>compile</id>
                         <goals>
                             <goal>compile</goal>
                         </goals>
+                        <phase>process-sources</phase>
                         <configuration>
                             <sourceDirs>
                                 <source>src/main/kotlin</source>
@@ -152,6 +160,7 @@
                         <goals>
                             <goal>test-compile</goal>
                         </goals>
+                        <phase>test-compile</phase>
                         <configuration>
                             <sourceDirs>
                                 <source>src/test/kotlin</source>
@@ -163,8 +172,24 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-plugin-plugin</artifactId>
-                <version>3.15.1</version>
+                <version>3.6.4</version>
+                <configuration>
+                    <extractors>
+                        <extractor>kotlin</extractor>
+                    </extractors>
+                </configuration>
+                <dependencies>
+                    <dependency>
+                        <groupId>com.github.gantsign.maven.plugin-tools</groupId>
+                        <artifactId>kotlin-maven-plugin-tools</artifactId>
+                        <version>1.1.0</version>
+                    </dependency>
+                </dependencies>
                 <executions>
+                    <execution>
+                        <id>default-descriptor</id>
+                        <phase>process-classes</phase>
+                    </execution>
                     <execution>
                         <id>generate-helpmojo</id>
                         <goals>
@@ -173,6 +198,11 @@
                     </execution>
                 </executions>
             </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-surefire-plugin</artifactId>
+                <version>3.5.2</version>
+            </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-source-plugin</artifactId>
@@ -188,8 +218,16 @@
             </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-surefire-plugin</artifactId>
-                <version>3.5.2</version>
+                <artifactId>maven-javadoc-plugin</artifactId>
+                <version>3.11.2</version>
+                <executions>
+                    <execution>
+                        <id>attach-javadocs</id>
+                        <goals>
+                            <goal>jar</goal>
+                        </goals>
+                    </execution>
+                </executions>
             </plugin>
         </plugins>
     </build>